The STS-2DC and STS-2DC9 Sequential Turn Signal kits will convert the taillights on your 2006-2010 Dodge Charger into Sequential Turn Signals. These kits contain two pre-wired, plug-in harnesses that install easily. There is no wire cutting or splicing of any kind! With Smart-Sequence technology, your tail lights sequence ONLY when a signal is on. When you hit the brakes, all lamps come on together. And, these harnesses feature sophisticated electronics that automatically adjust the sequencing speed to match the turn signal flasher in your car. While other products offer you fixed timing or complicated manual adjustments, these electronics sense your car’s flasher speed and adjust the sequence timing for you.